171520473 has 4 divisors (see below), whose sum is σ = 228693968. Its totient is φ = 114346980.

The previous prime is 171520457. The next prime is 171520477. The reversal of 171520473 is 374025171.

171520473 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 171520473 - 2⁴ = 171520457 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 171520473.

It is not an unprimeable number, because it can be changed into a prime (171520477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28586743 + ... + 28586748.

It is an arithmetic number, because the mean of its divisors is an integer number (57173492).

Almost surely, 2^171520473 is an apocalyptic number.

It is an amenable number.

171520473 is a deficient number, since it is larger than the sum of its proper divisors (57173495).

171520473 is an equidigital number, since it uses as much as digits as its factorization.

171520473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57173494.

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 171520473 is about 13096.5824931545. The cubic root of 171520473 is about 555.6124753784.

The spelling of 171520473 in words is "one hundred seventy-one million, five hundred twenty thousand, four hundred seventy-three".